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Mark Obrien

Chairman at Obrien Greene & Co in Media, PA

Investment adviser registrationUpdated

Mark Obrien is Chairman of Obrien Greene & Co Inc, an investment adviser managing $464M, and works from its Media, PA office. Mark Obrien has been registered as an investment adviser representative through Obrien Greene & Co since 3 May 1991, has 35 years in the industry across 1 firm and has passed the Series 63.

35
Years in industry
35
Years at firm
1
Adviser firms
2
States registered

From the IAPD record, checked 22 October 2026SEC record

Career

Mark Obrien has been Chairman of Obrien Greene & Co since July 2020, is not listed as a control person, but directly owns under 5% of the firm.

Obrien Greene & Co Inc is a Media, PA firm with $464M under management, 148 clients and 4 advisers in one office, as of its June 2026 filing.

  1. – present · 35 years
    Media, PA · Adviser representative · Firm CRD 110281

Credentials and registrations

Investment adviser representative registrations

Mark Obrien is registered as an investment adviser representative in 2 states, as a resident of Texas. The first approvals date from May 1991; the most recent is Texas, in December 2005.

  • PennsylvaniaSince 3 May 1991
  • TexasResidentSince 16 December 2005

Examinations

Series 6328 August 1987
Name
Uniform Securities Agent State Law Examination

Key facts

Full name
Mark Bennett Obrien
CRD
1631654
Firm
Obrien Greene & Co · CRD 110281
Role
Chairman
Office
218 WEST STATE ST., Media, PA 19063
Registration
Investment adviser registration
In the industry since
May 1991
Disciplinary history
Not yet shown here · SEC record

Common questions

Where does Mark Obrien work?

Mark Obrien has been Chairman of Obrien Greene & Co Inc since July 2020.

Source: Form ADV, Schedule A, filed 17 June 2026

Is Mark Obrien a financial advisor?

Yes. Mark Obrien has a current investment-adviser registration in Pennsylvania and Texas, through Obrien Greene & Co since May 1991.

Source: IAPD individual record, checked 22 October 2026

How many years of experience does Mark Obrien have?

Mark Obrien has 35 years in the financial industry, since May 1991, across 1 adviser firm.

Source: IAPD individual record, checked 22 October 2026

What exams has Mark Obrien passed?

Mark Obrien passed the Series 63 in August 1987.

Source: IAPD individual record, checked 22 October 2026

Where is Mark Obrien based?

Mark Obrien’s registered office is in Media, PA.

Source: IAPD individual record, checked 22 October 2026

Is Mark Obrien registered with FINRA?

No. Mark Obrien has no current broker registration.

Source: IAPD individual record, checked 22 October 2026

How can I verify Mark Obrien’s record?

Search CRD 1631654 on the SEC’s adviser search (adviserinfo.sec.gov), which publishes Mark Obrien’s full registration record.

Source: IAPD individual record, checked 22 October 2026

Leadership at Obrien Greene & Co

Sources

  1. IAPD individual record, CRD 1631654, checked 22 October 2026. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of Obrien Greene & Co Inc, filed 17 June 2026. Title, control and ownership bands.